On 7 Mar 2005, at 12:10, [EMAIL PROTECTED] wrote:
Hello all,
I Have to install an asterisk based PBX on a large Bussines, about 200 extensions, where the phone is a very critical service, this bussines need to be called and call the whole day.
I am thinking to install two asterisk servers with the same config, and if one of them will be broken the otrer one takes the control of all the calls.
Actualy, I do not know how would be the best way to do that, via hardware (buying a especific machine)(witch one), via software (for example rsinc, or witch software soulh I use), or other vay.
What do you think about that?
Witch way do you prefer?
How do you do that?
Any clue will be wellcomed.
Ah, It depends on a few factors.
1) What is an acceptable downtime ?
2) What is an acceptable frequency of downtime ?
3) What technical resources are available on/off site?
4) How much is it worth ?
Others will no doubt chime in with higher-end solutions, but consider this
as a basic starting point:
Lets assume that acceptable downtime is Max 4 hours and acceptable frequency is once
every 2 years. Also let's say there are competent PC staff on site, but no Linux skills. Finally
imagine that the customer says that it's worth $5k/pa to hit those targets.
The easiest way to do this is to buy quality hardware (MTBF of 5 years say), create a
good backup scheme and train the onsite folks how/when to do a restore. Then either buy a
duplicate system and put it in a cupboard or sign a 2 hour maintenance contract with a
hardware vendor.
This way, when they have a problem, they wheel out the spare, load the backup,
swap the cables and away you go.
The _huge_ advantage of this is simplicity. I know a high availability site where 2 out of the
3 failures in 5 years were directly related to misconfigured HA :-) My favorite was when
the license for the 'robust' filesystem expired !
Tim.
Ismael.http://www.westhawk.co.uk/
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